Rose does not find Alex in a bin
Here's a brief description of the contestant's attempt. Someone's probably working writing up more detail!
Rose uncovered but missed the clue about the bin number. She narrowed her options down to bins 1 and 5. After dropping the stethoscope into bin 5, she ended up guessing Alex was in bin number 1. As it contained water, she received no points.
(Written by Taskmaster Wiki contributors)